The Blue-Staining Mushroom Rant: Are You Even a Real Yunnan Local?

In Yunnan, the annual mushroom season invariably sparks a collective frenzy with a distinctly ‘poisonous’ edge (and yes, we mean the actual toxicity of wild mushrooms). In recent years, as these fungi have crossed provincial borders and captured the wider public’s attention, the market has been shaken up each year by some unforeseen spectacle, rippling through every link in the supply chain from local foragers to restaurant owners. Much like how *A Bite of China* brought matsutake to fame years ago, the viral “Red Umbrella, White Pole” song did for Russula in 2021, and celebrity Barbie Hsu (“Big S”) did for truffles in 2022, this year it is Jianshouqing that has gone mainstream – propelled into the spotlight by none other than US Treasury Secretary Janet Yellen.

One must admit that Janet Yellen’s visit brought a staggering windfall to the mushroom vendors. In June, when jianshouqing prices are already sky-high, marketing gimmicks like “Mushrooms first, people later” elevated the fungus to “jianshoujin” (golden fortune mushroom) status. Prices were so exorbitant this season that even locals barely managed a couple of bites (not that I could afford it anyway). Furthermore, “Grandma Fortune God” boldly ordering four plates of stir-fried mushrooms in one go practically earned her honorary Yunnanese status! She certainly showed more courage than most native-born locals, who tend to be far more cautious (my family included).

Every household in Yunnan has a trusted master of stir-frying mushrooms; you simply wouldn’t risk eating them prepared by anyone else. In my family, that role always falls to my mother, who insists on gathering the whole extended clan whenever we have jianshouqing. Friends joke that this collective mushroom-eating ritual is all about “shared benefits, shared risks.” Of course, those who have braved jianshouqing together are practically friends for life!

Lard and garlic, stir-fried and wok-tossed without ever sticking together—that’s my mother’s unchanging recipe. She won’t rest her aching arms until the mushrooms have cooked down, their moisture gone, and the rich aroma of the lard fills the kitchen.

When you stare at a glistening, oil-drenched plate of wild mushrooms, ready to tuck in, the older generation is quick to warn you: ‘don’t overindulge’, and ‘leave a few behind’. Invariably, at least one person at the table will exercise such extreme caution that they won’t touch the fungi at all. And even hours later, long after the meal has been digested, you’ll still hear them asking one another whether they’ve spotted any ‘little people’.

This caution stems from a familiar, almost thrilling awareness of how easily one might experience mild toxicity, where skipping a single preparation step could have you ‘seeing little people’. Yet we never lay the blame at the door of the see-hand-blue bolete itself! (The fungi are simply too delicious to be at fault!) Visitors from outside the province often look baffled and ask, ‘If it’s poisonous, why eat it at all?’

It might be worth considering: could ‘being poisonous’ and ‘being edible’ actually be two entirely different things?

The Yunnanese diet is far from free of ‘toxic’ ingredients. Common staples such as Chinese yam, konjac, taro blossoms, runner beans, yellow broom, and white brinjal will all cause poisoning if not cooked properly. The category of ‘toxic’ wild fungi is similarly broad: it encompasses species that are harmful to humans if ingested raw, fungi whose toxins are neutralised through proper preparation, and even varieties that are perfectly safe for people but act as a natural pesticide to insects and other animals.

Although certain wild species contain one or more toxins harmful to the human body, processes such as thorough boiling, washing, or pickling can strip these compounds away or denature them, rendering the fungi safe to eat. (Even the notoriously lethal fly agaric, *Amanita muscaria*, has documented cases of safe consumption when prepared correctly.) Chinese experts classify mushroom poisoning into seven types based on the primary organs affected: ① acute hepatotoxicity (liver damage); ② acute nephrotoxicity (kidney failure); ③ gastrointestinal syndrome; ④ neurotoxic/psychotropic syndrome; ⑤ haemolytic syndrome; ⑥ rhabdomyolysis; and ⑦ photosensitive dermatitis.

Furthermore, an analysis of 223 poisoning cases in Yunnan between 2013 and 2022—where the specific species was identified—reveals that every incident fell into one of the six categories excluding the haemolytic type. Within these, the red see-hand-blue (specifically *Lanmaoa asiatica*) accounted for the third-highest number of neurotoxic/psychotropic cases. Incidents predominantly occurred in domestic kitchens, and notably, there were zero fatalities following medical intervention.

It follows, then, that while the red see-hand-blue (*Lanmaoa asiatica*) does contain toxins, there have been no recorded fatalities. When cooked thoroughly, the risk of poisoning is virtually non-existent. Yet even seasoned locals with generations of preparation experience can occasionally slip up, making professional restaurants a comparatively safer bet. This is largely because stringent market oversight forces eateries serving see-hand-blue to adopt rigorous preparation standards, thereby minimising the risk of poisoning.

In truth, even within Yunnan, many people are unsure exactly how the see-hand-blue causes toxicity or how to distinguish between varying degrees of symptoms. In our local dialect, any reaction to wild mushrooms is simply referred to as ‘naozhe’ (a mild, unsettling reaction), and joking about ‘seeing little people’ is commonplace. It’s as if everyday language employs levity to dilute the very real fear of fungal toxicity.

However, this year has seen an unusual trend. Searching for ‘Jianshouqing’ on major social platforms yields a flood of posts from accounts outside Yunnan, showcasing the Hongcong mushrooms they’ve purchased. Numerous food bloggers have even published cooking guides and tasting reviews. Yet, this has been followed by a sharp increase in Jianshouqing poisoning cases beyond the province’s borders.

In previous years, vendors would always warn curious out-of-town tourists that Jianshouqing is ‘mildly toxic’ and should be ‘eaten sparingly’. But with the massive online popularity of ‘Jianshoujin’ this year, the mushroom’s inherent poisoning risk has been overshadowed by the lure of profit, leading even national fresh-produce e-commerce platforms to rush listings. Thanks to cold-chain logistics and online marketplaces, diners with absolutely no experience can now effortlessly purchase these highly regional wild mushrooms. Yet, while a single tap lets you buy the fungi, it cannot buy the local expertise and cultural mindset required to handle them, nor the hospital treatments needed if things go wrong.

What exactly is this local mindset? During fieldwork, I once heard someone remark: “Eat too much rice and you’ll get diarrhoea; take the wrong medicine and you’ll feel dizzy. If it makes you uncomfortable, it’ll just wear off…” In plain terms, Yunnanese folk are thoroughly accustomed to wild mushroom poisoning. Even friends of mine who have been poisoned will animatedly recount their experiences, including how they were made to vomit at the hospital… But for those lacking both experience and this mindset, the onset of symptoms quickly spirals into fear of the unknown and death, sending them scrambling for medical help. The problem is, hospitals outside the province lack both the experience and the specialised techniques to treat it…

To the general public, the toxicity of Jianshouqing remains poorly understood, while scientific knowledge of the fungus is only gradually catching up. Without instruments to test for toxins, the only way to know if a mushroom is poisonous is to eat it and see what happens. Therefore, for foragers and diners who lack scientific methods for identification, personal experience and culturally acquired knowledge remain the most effective means of distinguishing toxic fungi.

Before experts categorised fungi into toxic and non-toxic groups, the public tended to classify mushrooms simply as edible or not. As scientific classification systems gradually permeated daily life, they merged with fragments of folk tradition to forge new authorities and discourses. Through toxic mushroom guides, poisoning prevention pamphlets, and educational folk rhymes, people absorbed fragmented knowledge about wild fungi, cultivating a patchwork of personal experiences and beliefs. In this process, “Jianshouqing” became a cognitive and cultural dietary prejudice—widely circulated, amplified, and continually reinvented.

Many struggle to grasp the distinction: a “toxic mushroom” is not necessarily inedible, nor is an inedible fungus necessarily “toxic”. Whether a mushroom is poisonous speaks to its biological nature; whether it can be eaten speaks to its cultural context. As the old saying goes, one man’s meat is another man’s poison.

Originally, Jianshouqing was merely a dietary custom of a small community, rooted in local knowledge. It shaped the local population’s perception and tolerance of “toxicity”, inspired a variety of preparation methods to neutralise the risk, and cultivated an entire ethnomycological framework for foraging, identifying, sharing, and utilising these fungi. As wild mushrooms continue to intersect with the wider world, Jianshouqing and its accompanying local wisdom have gradually entered the public consciousness. Consequently, outsiders’ understanding of the fungus is slowly shifting from asking “is it poisonous?” to “is it safe to eat?”.

Finally, regarding the “little people”, I can only say: it is absolutely true! Though the visions do not occur every time. Please do not gamble with your health just to chase a hallucination. If you’re from out of town and fancy a taste of Jianshouqing, why not make the trip to Yunnan? First you question the Yunnanese, then you understand them, and before you know it, you’ve become one of them.